Abstract

PARDINAS, Ulyses F. J; VOGLINO, Damián  and  GALLIARI, Carlos A. Miscellany on Bibimys (Rodentia, Sigmodontinae), a unique akodontine cricetid. Mastozool. neotrop. [online]. 2017, vol.24, n.1, pp.241-250. ISSN 0327-9383.

We comment on the geographical distribution of the 3 recognized species of Bibimys, focusing in the type species, B. torresi. By briefly reviewing the fossil occurrence of this form we posit that the species suffered a very recent marked retraction. Based on few collected individuals belonging to B. chacoensis and B. torresi, we describe some external traits, such as their unique mammary dotation composed by 2 pairs located more caudally, 1 of them laterally to the genitalia. Combining morphology with direct observation of a wild individual we advance that Bibimys is not a fossorial or semi-fossorial form but a specialized sigmodontine focused on the active search for food employing mostly the nose.

Keywords : Akodontini; Anatomy; Bibimys chacoensis; Bibimys torresi; Distribution; Holocene.